Nine people were injured Sunday morning after a Califonia driver ran over pedestrians and trapped some under his vehicle, police said.

Christopher Solis, 22, was arrested on a charge of DUI causing great bodily injury following the incident in downtown Fullerton. Police say Solis was impaired and driving when he ran his Toyota Tacoma into pedestrians walking on the sidewalk just before 1:50 a.m. Several people were trapped under the vehicle after it crashed into a tree. People nearby helped free those stuck underneath the vehicle and performed “life-saving measures” before firefighters arrived on the scene.

The victims were all between 18 and 49 years old and were taken to the hospital with injuries that were moderate to critical life-threatening.